CAT1641WI25 Equivalent & Substitute Parts

Part Overview

The CAT1641WI25 is a supervisor integrated circuit from onsemi designed for power management applications. This device functions as a simple reset/power-on reset controller with open drain or open collector output, monitoring a single voltage channel with a 2.55V threshold. The CAT1641WI25 is classified as an obsolete product, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain functional equivalence across critical electrical and mechanical parameters to ensure direct replacement capability.

Substiute Parts

CAT1641WI25

onsemiIn Stock: 789CAT1641WI25 Datasheet

Current PartRFQ

CAT1641YI-25-T3

onsemiIn Stock: 1034CAT1641YI-25-T3 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CAT1641WI25 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Single voltage channel monitoring capability
• 2.55V threshold voltage specification
• Open drain or open collector output configuration
• Active high reset logic
• 130ms minimum reset timeout duration
• Operating temperature range of -40°C to 85°C

Mechanical Equivalence Requirements:

• Surface mount technology
• 8-pin package configuration
• MSL rating of 1 (Unlimited)

Regulatory Equivalence Requirements:

• REACH Unaffected status
• Compliance with applicable environmental standards

The CAT1641YI-25-T3 qualifies as a substitute part based on matching all electrical parameters, maintaining the same base product number (CAT1641), and providing equivalent functional performance. The primary distinction between these parts is the package type: the main part uses 8-SOIC (0.154", 3.90mm width) while the substitute uses 8-TSSOP (0.173", 4.40mm width). Both packages are surface mount configurations with identical pin counts and electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

The CAT1641YI-25-T3 serves as the primary active substitute for the obsolete CAT1641WI25. Selection of this substitute is supported by the following engineering considerations:

Product Status Advantage: The CAT1641YI-25-T3 maintains active product status with onsemi, ensuring continued availability, technical support, and manufacturing consistency. The CAT1641WI25 is classified as obsolete, creating supply chain risk and limiting access to new inventory.

Electrical Equivalence: All critical electrical parameters are identical between the main part and substitute, including voltage threshold, output configuration, reset logic, timeout duration, and operating temperature range. This equivalence ensures functional compatibility in existing circuit designs.

Regulatory Compliance: The CAT1641YI-25-T3 carries RoHS3 compliance certification and EAR99 export classification, providing enhanced regulatory alignment compared to the obsolete main part. Both parts maintain REACH Unaffected status.

Package Consideration: The substitute employs an 8-TSSOP package instead of the 8-SOIC package used by the main part. Both are surface mount configurations with 8 pins. PCB layout modifications are required to accommodate the different package footprint dimensions (0.173" vs. 0.154" width). Pin configuration and electrical connectivity remain equivalent.

Inventory Availability: The CAT1641YI-25-T3 is available with 1018 pieces in new original stock, providing immediate procurement capability for production requirements.

Frequently Asked Questions (FAQ)

Q: Can the CAT1641YI-25-T3 directly replace the CAT1641WI25 without circuit modifications?

A: The CAT1641YI-25-T3 provides electrical equivalence and can replace the CAT1641WI25 functionally. However, PCB layout modifications are required due to the different package types (8-SOIC versus 8-TSSOP). The footprint dimensions differ, necessitating PCB redesign. Pin connectivity and electrical function remain equivalent.

Q: What is the primary reason for substituting the CAT1641WI25?

A: The CAT1641WI25 is classified as an obsolete product. The CAT1641YI-25-T3 is an active product from the same manufacturer with identical electrical specifications, ensuring continued availability and manufacturing support.

Q: Are there any electrical performance differences between these parts?

A: No. Both parts share identical electrical parameters: 1-channel voltage monitoring, 2.55V threshold, open drain/open collector output, active high reset logic, 130ms minimum reset timeout, and -40°C to 85°C operating temperature range.

Q: What package types are used for each part?

A: The CAT1641WI25 uses an 8-SOIC package (0.154", 3.90mm width). The CAT1641YI-25-T3 uses an 8-TSSOP package (0.173", 4.40mm width). Both are surface mount 8-pin packages with different physical dimensions.

Q: Does the CAT1641YI-25-T3 have better regulatory compliance?

A: The CAT1641YI-25-T3 carries RoHS3 compliance certification and EAR99 export classification. The obsolete CAT1641WI25 does not have these current certifications. Both maintain REACH Unaffected status.

Q: What is the MSL rating for the substitute part?

A: The CAT1641YI-25-T3 has an MSL rating of 1 (Unlimited), identical to the main part. This indicates unlimited shelf life under normal storage conditions.

Q: Is the pin configuration identical between these parts?

A: Both parts are 8-pin surface mount devices with equivalent electrical pin configuration and functionality. The physical package dimensions differ, requiring PCB layout adjustments.